Chonaphini

Chonaphini species can be distinguished from other Xystodesmidae tribes by subtle gonopodal (male reproductive appendage) characters and segmental tuberculation patterns. The tribe shares the family-typical flat-backed body profile with lateral keels (paranota) on each diplosegment, but specific tribal boundaries require examination of mature male specimens.

Species within Chonaphini occur in mesic forest environments of western North America, particularly in the Pacific Northwest and montane regions. They inhabit the forest floor litter layer and decaying wood, requiring humid microhabitats to prevent desiccation.

Western North America, including the Pacific Northwest region of the United States and adjacent areas of Canada. The constituent genera show regional endemism, with Chonaphe, Metaxycheir, and Tubaphe primarily distributed in the Pacific coastal states and provinces.

As detritivores, members of Chonaphini contribute to decomposition of leaf litter and woody debris in forest ecosystems, facilitating nutrient cycling and soil formation.

• XystodesminiAnother tribe within Xystodesmidae; distinguished by gonopodal morphology and geographic distribution (primarily eastern North America for many genera)
• PachydesminiTribe in Xystodesmidae with overlapping western North American distribution; separable by gonopodal structure and body tuberculation patterns

• millipede
• flat-backed millipede
• xystodesmid
• detritivore
• forest floor
• western North America
• Pacific Northwest

• BugGuide
• Wikipedia
• NCBI Taxonomy
• Catalogue of Life